Omi Posted February 6, 2019 Report Share Posted February 6, 2019 Need help turning on a 91 MR2 3sgte with coils and other aftermarket parts.When I crank the engine it backfire. I check the timing with a timing gun and it's on time.Car sparks and has fuel pressure. Going to attach the map that I am running on the car. Toyota Celica ST185 G4+ Xtreme Plugin.pclr Quote Link to comment Share on other sites More sharing options...
ClintBHP Posted February 7, 2019 Report Share Posted February 7, 2019 Are you 360 degrees out ? Adamw 1 Quote Link to comment Share on other sites More sharing options...
Omi Posted February 7, 2019 Author Report Share Posted February 7, 2019 The other trigger offset number that was on 0 was -240 but I didn't try it with the fuel on. That one of the things I am going to try tomorrow Quote Link to comment Share on other sites More sharing options...
Omi Posted February 7, 2019 Author Report Share Posted February 7, 2019 It turned on -243 but knock level stays on 1000 knock counter stays on 250 using oem knock sensor.Is it supposed to be in those numbers Quote Link to comment Share on other sites More sharing options...
ClintBHP Posted February 7, 2019 Report Share Posted February 7, 2019 Drop the gain down, adjust the knock target so it’s just above the noise. Quote Link to comment Share on other sites More sharing options...
Omi Posted February 10, 2019 Author Report Share Posted February 10, 2019 I did what you said and numbers went down.I have question vacuum or map reading is around 10 at idle is it to low. Quote Link to comment Share on other sites More sharing options...
cj Posted February 10, 2019 Report Share Posted February 10, 2019 10 kpa MAP or -10 MGP (ie 90kpa)? 10kpa would be very low, typically you would only see this amount of vacuum on overrun and i'd be suspicious of your MAP calibtraion if you see this at idle. 90kpa (ie -10 MGP) is very high for a factory intake manifold and cams. You might see this with ITB's and big cams, but factory cams and manifold should give you 25-40 MAP (ie -60 to about -75 MGP) and 90kpa would suggest an intake leak or again, MAP calibration issues. Quote Link to comment Share on other sites More sharing options...
Omi Posted February 11, 2019 Author Report Share Posted February 11, 2019 10 psi MAP and -4.6 psi MGP.I do have bigger cams and factory intake manifold. Quote Link to comment Share on other sites More sharing options...
cj Posted February 11, 2019 Report Share Posted February 11, 2019 so about 65-70 kpa. with bigger cams its a believable number. If you're suspicious or have unstable idle then a smoke/leak test wouldnt hurt, but its in the ballpark assuming a fair bit of cam overlap. Quote Link to comment Share on other sites More sharing options...
Omi Posted February 25, 2019 Author Report Share Posted February 25, 2019 There no leaks and idles good.I notice something new it doesn't want to rev past 1500 rpm Quote Link to comment Share on other sites More sharing options...
cj Posted February 25, 2019 Report Share Posted February 25, 2019 Can you post a log of it starting + idling for a bit + then trying to rev it up? Quote Link to comment Share on other sites More sharing options...
Omi Posted February 25, 2019 Author Report Share Posted February 25, 2019 I have this log file Log 2019-02-25 3;37;52 pm.llg Just notice my TP sensor not reading going to check that. Quote Link to comment Share on other sites More sharing options...
Adamw Posted February 26, 2019 Report Share Posted February 26, 2019 Except for TP, I dont see anything else too unusual in your log. Are you sure the throttle blade is actually moving? Quote Link to comment Share on other sites More sharing options...
Omi Posted February 26, 2019 Author Report Share Posted February 26, 2019 The TPS is reading fine recalibrated just in case,throttle body blade opens and closes.It still doesn't want to rev higher. Quote Link to comment Share on other sites More sharing options...
cj Posted February 27, 2019 Report Share Posted February 27, 2019 Where in your log did you try to rev it higher? I can only see a couple points that might be relevant but I'm not really seeing a problem as such. between 0:30 and 0:34 the rpm is just under 1500rpm but the map & TPS value look more like high idle than you actually trying to rev it. At 1:11, 1:21, and a few other places it looks like you back off the throttle right as things get to 1500rpm. Are you holding the throttle right down at these points? You have what look like sensible fuel and spark numbers, no limiters etc. You arent running one of the clutched throttle bodies off the altezza's or supra's are you that might be playing up? It really looks like something is restricting air flow through the throttle. If you pull the intake hose and twist the throttle manually (and watch the blade), can you get it over 1500rpm? Quote Link to comment Share on other sites More sharing options...
Adamw Posted February 27, 2019 Report Share Posted February 27, 2019 As well as what CJ says, can you do us another log with the throttle actually moved more than 5%, that may make it more obvious. Quote Link to comment Share on other sites More sharing options...
Omi Posted February 27, 2019 Author Report Share Posted February 27, 2019 Here another log file.it has a oem 3sgte throttle body and the butterfly opens all the way when car is on and it still doesn't past the rpm.I unplugged tps and I also installed different one and still does the same thing. Log 2019-02-27 3;36;10 pm.llg Quote Link to comment Share on other sites More sharing options...
Richard Hill Posted February 27, 2019 Report Share Posted February 27, 2019 Are you running cats? If so, are they flowing OK? Quote Link to comment Share on other sites More sharing options...
Toliski Posted February 27, 2019 Report Share Posted February 27, 2019 52 minutes ago, Omi said: Here another log file.it has a oem 3sgte throttle body and the butterfly opens all the way when car is on and it still doesn't past the rpm.I unplugged tps and I also installed different one and still does the same thing. Log 2019-02-27 3;36;10 pm.llg 429.74 kB · 3 downloads I dont think that your tps cause this problem. I have same problem with my St205 but at 4000RPM. My triggers was off but no trigger errors. If your dont have a Trigger Scope try this and see if it just revvs past the 1500RPM. But you must calibrate the triggers with the proper way. My triggers now are Trigger 1 0 1000 2000 3000 Trigger 2 0 1000 2000 3000 0.2 1 1.6 2 0.3 1.7 3.2 4.5 Quote Link to comment Share on other sites More sharing options...
cj Posted February 27, 2019 Report Share Posted February 27, 2019 That TPS singal looks better but you still need to run a re-calibration as the first 10-20% of the pedal travel isnt being registered, but that isn't why its stopping at 1500rpm. spark, fuel, afr all look normal. Does it backfire/stutter/etc at 1500 or does it just sound like you're only holding your foot down 20%? It still looks like a mechnical blockage somewhere. If you disconnect the intake piping at the manifold can you rev it higher? This will rule out blocked filter etc. Can you spin the turbo by hand? if it were seized you could be blocking up both the intake and exhaust side which would do something like this. Are your cams intalled properly? either cam being off by a couple teeth (or adjusted too far if they can adjusted) could show up like this. The only ecu-ish thing I can see that might be relevant is that you still have your MAF hooked up, but its calibration is all wrong and the ECU thinks its a fuel pressure sensor! you dont have it configured to use this pressure in the fuelling calculations, so it shouldnt be relevant but its a bit strange. It also only ever shows "pressure" on overrun when you jump off the throttle. This was the same as your last log too. This could be your recirc valve opening and dumping boost, but you shouldnt have any boost there to vent as it never breaks 100kpa at open throttle. I'm not exactly sure what this means the fault is but if it were me i'd look into this a bit and see where it leads. alexjohn 1 Quote Link to comment Share on other sites More sharing options...
Omi Posted February 28, 2019 Author Report Share Posted February 28, 2019 The compressor wheel spin pretty fast, no cat exhaust flow good doesn't smoke, no AFM installed either.When it at 1500 it feel like it loses power doesn't backfire.Going to check the things all of you told me and some mechanical things Quote Link to comment Share on other sites More sharing options...
Adamw Posted February 28, 2019 Report Share Posted February 28, 2019 Im with CJ here, I dont see anything unusual ECU wise, it seems very much like a flow restriction. Have you had the manifold off recently? I have seen before guys leave rags stuffed inside etc... Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.